VR: Refresh controller handedness when resuming the controller.

chrome/browser/android/vr_shell/elbow_model.cc

Index: chrome/browser/android/vr_shell/elbow_model.cc
diff --git a/chrome/browser/android/vr_shell/elbow_model.cc b/chrome/browser/android/vr_shell/elbow_model.cc
index f2cd825af75f56f90515bedbbf356bf0e49d46ee..723c3454f71682e49f8dca8bee04d08acd08a526 100644
--- a/chrome/browser/android/vr_shell/elbow_model.cc
+++ b/chrome/browser/android/vr_shell/elbow_model.cc
@@ -32,10 +32,19 @@ constexpr float kDefaultElbowRotationRatio = 0.4f;
 }  // namespace
 
 ElbowModel::ElbowModel(gvr::ControllerHandedness handedness)
-    : handedness_(handedness), alpha_value_(1.0f), torso_direction_(kForward) {}
+    : handedness_(handedness), alpha_value_(1.0f), torso_direction_(kForward) {
+  UpdateHandedness();
+}
 
 ElbowModel::~ElbowModel() = default;
 
+void ElbowModel::SetHandedness(gvr::ControllerHandedness handedness) {
+  if (handedness == handedness_)
+    return;
+  handedness_ = handedness;
+  UpdateHandedness();
+}
+
 void ElbowModel::UpdateHandedness() {
   handed_multiplier_ = {
       handedness_ == GVR_CONTROLLER_RIGHT_HANDED ? 1.0f : -1.0f, 1.0f, 1.0f};
@@ -45,7 +54,6 @@ void ElbowModel::UpdateHandedness() {
 }
 
 void ElbowModel::Update(const UpdateData& update) {
-  UpdateHandedness();
   UpdateTorsoDirection(update);
   ApplyArmModel(update);
   UpdateTransparency(update);